media_build fail

Building on an old 32bit PC with gcc 4.0.3, though I did manage to build some weeks ago.

Today I get -

C [M] /home/andy/Src/media_build/v4l/radio-isa.o /home/andy/Src/media_build/v4l/radio-isa.c: In function 'radio_isa_probe':
/home/andy/Src/media_build/v4l/radio-isa.c:246: error: implicit declaration of function 'kfree' make[3]: *** [/home/andy/Src/media_build/v4l/radio-isa.o] Error 1
make[2]: *** [_module_/home/andy/Src/media_build/v4l] Error 2
make[2]: Leaving directory `/home/andy/Src/Kernels/linux-3.3-rc4'
make[1]: *** [default] Error 2
make[1]: Leaving directory `/home/andy/Src/media_build/v4l'
make: *** [all] Error 2
build failed at ./build line 410.